processor switch, black screen

i have msi k9n something v motherboard, 2gb ddr2, and cpu 2.2 amd 64x (4000+), i recently bought x2 64 cpu (3600) both am2 socket, i switched processors, and i get black screen on boot up, i switch back to my old proc, same thing, after few tries, and ram pulling, my old processor worked, i pluged of power, put new proc, again black screen, put back old proc and again black screen, help plz

i tried reseting cmos with jumpers, 0 points, everything works, the fans, i can hear cpu, cpu is compatible with mainboard, and cant see anything except pitch black, from second i turn on pc, all lights are up, except on keyoard

Well, without the exact motherboard model and the exact processors we are at an impasse. I sounds like you may have damaged the board.

Some basic questions. Do you have on board graphics? If so, do you also have an add in card? Provide details.Did you have the computer unplugged when swapping out the CPU? Did you clean the heat sink and apply a small amount of thermal paste?

pc wasnt pluged out, only pressed on "0", with that switch 0-1. while i was changing cpu-s i tried booting pc without fan on cpu, max twice on each cpu after it wasnt working with fans and only for a few seconds, and as i told on my many attempts to start pc normaly i managed only once on mine old cpu which isnt working anymore, after pluging out 1gb of ram.

and ye, i dont use integrated graphic card, i got ati radeon hd 4650 or something like that, and put that integrated graphic card on 16 or whatever is the lowest for it to operate and disabled it in bios, ofc when pc was working

However, if you DO NOT have a HD 4600 series cpu, then a a 500 watt power supply may NOT be sufficient..

There are lots of el-cheapo power supplies out there there are a lot more likely to cause you problems.Who is the maker of the power supply ?....

"pc wasnt pluged out, only pressed on "0", with that switch 0-1."

The problem with using the switch on the power supply itself is that it's too easy to un-intentionally have it in the ON position.

If you unplug the power cord to the PS - recommended - or - not as good because you might forget to do that too - switch off the AC power to the cord e.g. by switching off a power bar it's connected to- then it doesn't matter whether the switch on the power supply itself is on or off.

"i tried booting pc without fan on cpu, max twice on each cpu after it wasnt working with fans and only for a few seconds"

You MUST connect a 3 or 4 wire fan connector from a fan to the cpu fan header on the mboard !The bios on modern mboards will automatically SHUT DOWN the mboard within a few seconds when NO RPM is detected from the cpu fan header !

"and as i told on my many attempts to start pc normaly i managed only once on mine old cpu which isnt working anymore, after pluging out 1gb of ram."

Ram that worked fine before does NOT spontaneously go "BAD".

However, it IS possible that something you did has damaged it, or that something else has damaged it, such as a power supply while failing, or by a power spike or power surge, OR you may have damaged the power supply.

The ram can be tested in another mboard that the ram is compatible with. (To avoid possible complications, install only the ram you're testing to see if it works,one module at a time, or only the ram modules from your mboard, in the other mboard.)

"i dont use integrated graphic card, i got ati radeon hd 4650 or something like that, and put that integrated graphic card on 16 or whatever is the lowest for it to operate and disabled it in bios, ofc when pc was working"

Any device adapter that's built into the mboard IS NOT A CARD !A device is also a CARD ONLY if it's on a physical board that plugs into and can be unplugged from a mboard slot inside the case .The onboard video - video built into the mboard - is a video adapter or a graphics adapter or a display adapter, but IT'S NOT A CARD !

There is NO setting in your bios Setup that can disable the onboard video (unless the main chipset supports Hybrid video -yours doesn't.)The bios automatically disables the onboard video when a working PCI-E X16 video card is installed in the working PCI-E X 16 slot on the mboard, and the bios then ignores any setting for the amount of ram shared with the onboard video in Setup.

The mboard, the video chipset, and Windows before specific video drivers have been loaded, all support basic VGA video, and even before you have loaded specific video drivers in Windows, the display will probably have at least 256 colors.

The drivers / software on the hard drive has absolutely nothing to do with whether you get normal video from the video adapter while booting before the operating system loads. That does not even require that you have a hard drive connected to the mboard.

..........

It's possible that the replacement cpu is not recognized by the bios version the mboard presently has, and in that case the mboard may not boot normally when the replacement cpu installed, but there is NO reason why the original cpu would not still work, unless

- something that should be connected from the power supply to the mboard or the video card in the slot is not connected- most mboards require TWO power connections - to the main 20 or 24 pin socket, and to a smaller 4 or 8 pin socket- if your video card installed in a slot has one or two power sockets,then there must be one or two connectors from the power supply connected to that / those, that fills the socket. (if you DO have a HD 4650, it requires one 6 pin PCI-E connector to be plugged into it from the PS.

(If you install any module backwards in a ram slot, both the module that was installed backwards and the ram slot circuits the backwards module was in are instantly damaged when you attempt to boot the computer, and neither will ever work again. You smell a burnt plastic smell, and you may see a small puff of smoke. At least one contact on the ram module will be damaged or missing (it was vaporized or it fell off), there may be melted plastic exactly where the contact was missing or damaged on the ram module when it was backwards and black carbon in the ram slot.)

- you don't have a 3 or 4 wire connector from a fan connected to the cpu fan header.

- the power supply has been damaged

Failing power supplies are common and can cause your symptoms.Check your PS.They often partially work, fans and hard drives may spin, leds may come on, yet you may get no video and the mboard will not boot all the way.See response 4 in this:http://www.computing.net/hardware/w...

If you can borrow a power supply from another working computer, try connecting that.

If it is failing, you can usually replace it with any decent quality standard sized standard ATX PS with the same capacity or greater.

Standard (PS/2) power supply size - 86mm high, 150mm wide, 140mm deep, or 3 3/8" h x 5 7/8" w x 5 1/2" d , or very close to that, though the depth can be more or less for some PSs.

Note - I may have mentioned Coolermaster in that - I have recently found some models have only a 1 year warranty, some are known to have premature fan failures, some are known to develop failing electrolytic capacitors.

Your power supply must have at least the minimum capacity required to support a system with the graphics card you are using installed, or the max graphics card you might install in the future.(Onboard video - video built into the mboard - IS NOT A CARD ! ) If that info is not in the ad for the video card, you can go to the video card maker's web site and look up the specs for the model - often under system requirements - the minimum PS wattage, and, more important, the minimum amperage the PS must supply at 12v is stated. If you don't find that, any card with the same video chipset including any letters after the model number has very similar minimum PS requirements. Some power supplies have two or more +12v ratings - in that case, add those ratings to determine the total +12v current capacity.

- the video card in the PCI-E X16 slot may not have been all the way down in it's slot at some point when you tried booting, and in that case it may be damaged.Try removing the video card and connecting your monitor to the onboard video port.Try the video card in another computer.

- extremely unlikely - I've only heard of this being the problem once - the cpu may not be seated properly such that it's not connecting to all the pins- remove the heat sink and try re-seating it

Wow I'm dumb , I had the black screen last night after pulling off the heatsink to repaste and because the cpu was stuck to it I neglected to notice the little lever on the mother board that you need to lift up b4 putting in the cpu and locking into place. I literally spent hours turning it on and off, checking the CPU ect. All along it was because the cpu was never making contact. So make sure you arent forgetting the lever!

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